THE SURVEY AND DOCUMENTATION 3D OF HISTORICAL UNDERGROUND CAVITIES

The geometric documentation of underground sites of natural or anthropogenic nature has always been a difficult problem to solve if approached in rigorous terms. Only recent developments in laser scanner technology have allowed the detection of a systematic and comprehensive cavities. Still, no doubt, due to accessibility issues and environmental sustainability for operators. The operating space available determine the choice of instrument, the methodology and consequently the economic aspect of the intervention, it becomes even more important with the reduction in amplitude of the cavity. In theoretical terms, up to the size of a room in an apartment, you can still use the same tools used in the relief of architectures. For smaller equipment must be used with anthropomorphic arm, which take the apron quite high. The example that is presented is related to an intervention survey and documentation of an underground space performed in Malta within a preservation and valorization project of an area related to the quarrying and transport of stone material (cart ruts)